2.2 Extracting Iron
Understand which metals can be extracted using carbon
Be able to describe how a blast furnace works
What do you understand?
How would you rate yourself when thinking about extraction of metals?
Metals above carbon must be extracted using electrolysis.
Metals below carbon
can be extracted from the ore by reduction using carbon, coke, or charcoal.
Gold and silver often do not need to
be extracted. They occur native.
The reactivity of a metal determines the method of extraction.
Iron – 2nd most common metal in the Earth’s crust
Found as haematite
Iron (III) oxide (Fe2O3)
Can be obtained using a blast furnace
carbon + oxygen carbon dioxide
Carbon dioxide + carbon carbon monoxide
Carbon monoxide + iron oxide iron + carbon dioxide
Calcium carbonate calcium oxide + carbon dioxide
Calcium oxide + silicon dioxide calcium silicate
This is called SLAG
Iron is not found naturally, but in Iron Ore
We can extract iron form iron ore using a Blast Furnace
Using chemistry we can produce pure iron
Limestone (CaCO3) is used to remove impurities
Coke/Carbon gives us the high temperature we need for the reactions to take place
Why can some metals be extracted using carbon when some can’t?
What do we use to extract iron?
How does a blast furnace work?
What chemical reactions take place?
Extraction of Iron